2 Power Supply/Chargers - One is selectable for 12VDC or 24VDC @ 6 amp and one is 24VDC @ 10 amp, non power-limited outputs. Maximal37FE Expandable Power System provides system designers and installers with optimum power choices and the highest levels of versatility. It provides 12VDC, 24VDC, or 12VDC and 24VDC simultaneously via two (2) single output power supply/chargers. System includes AC fail, low battery and battery presence monitoring. Enclosure facilitates up to four (4) 12VDC/12AH batteries. All interconnecting equipment must be UL Listed.